Improved rotary blowing-fan for furnaces, gas-works



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HENRY ALAND-OE LONDON, ENGLAND, AssIGNOR TOsAMUELy i AND GEORGE ALAND.

Letters Patent No. 87,456, latel-March 2, 1869.

The Schedule referred to in these Letters Patent and making part of the came. -.M

To all to whom 'it mag/'concern Ble it knownthat'l, HENRY ALAND, of 18- Richard street, Roupell street, Lambeth, London, in theeounty of Surrey, iron-founder, haveinvented new and useful Improvements in Rotary Fans for Producing Blast for Furnaces and other purposes, .which improvements mail. 21,150,106, applied .tenir and .gasexhausters -andl do hereby declare the nature of my said invention, and in-what manner the same is to be performed, to be particularly described in and by the following statement, reference Jbeing had 'to the drawing herewith annexed, and to the letters and -figures marked thereon; that is to say This improvement consists in the formation of a spacebetween the sides ofthe fan-disk and outer casing laterally on each side; also the introduction of a conical ring round the periphery of theinlet-openings, so as to direct a given pressure of air orI gas from the discharge-side to the supply, as shown in the accompanying drawings.

Figure 1 is a side elevation of blowing-fan.

Figure 2, a front elevation, showing the discharge. Figure 3,'a sectional plan, taken in the line 1 of 'Y fig. l.

Figure 4 is a side elevation of the fan in its application to an exhauster.

Figure v5,4 a front elevationof the same, and showing the discharge. v

Figure 6, a sectional plan through the line 3 4 in Ii 4.:

gFig. 3( A Aare the inletopenings or supplies from the surrounding atmosphere.

E E EE, the inlet-openings of fan-disk. rB B is the discharge of fan-disk inside of casing F F. O -(Il G C, the conical rings, round the periphery of the inlet-openings, leaving a space between the fandisk and cones, so as to direct a supply of air or gas from the discharge-side B B to the centre openings E E E' E, of a higherldensity than the surrounding atmosphere.

It`will thus be seen that a continuous pressure of air or gaswvill be' directed from the'periphery or die4 charge of the fan-disk, and injected, at the increased pressure, into i-ts centre, as shown by the darts inside of fig. 3,-thereby forming a better' impinging body, by which to produce a more perfect vacuum for the introduction of the supply, and increase the amount of work done.

D D-also show aninternal projection, roundv the inside of case, for dividing and grinding the fluid with regularity, in a direction toward the cones 'C O C O.-

Froni the foregoing explanation of its construction, it will now be understood that it' can be applied to all disk-fans, single or compound, with conical side plates to the'blades, as shown in fig. 2, H, orwith Ordinary dat side-plates.

'Having now described the nature of my invention, and in what manner .the same is to be performed, I wish ,it to be understood that what I claim, is

The directing a given pressure from the' discharge ofthe fan-disk periphery, and injecting it into its centre,`as hereinbefore described.

In witness whereof, I, the said HENRY ALAND, have hereunto set my hand and' seal, this 29th day oil September, A. D. 1868.

' HENRY ALAND. .[L. 8.]

Witnesses: v

Enwn HYDE, Ror LINKsoN. 

